JP2020002068A - Post-foamable composition and discharge product - Google Patents

Abstract

To provide a post-foamable composition that can maintain a stable discharge state even when stored for a long time, and prevents cracking from occurring in a synthetic-resin container body, and a discharge product.SOLUTION: A post-foamable composition is composed of a stock solution and a foaming agent, and has a 5°C viscosity of 10,000 mPa s or more, the stock solution containing a surfactant and water and having a 25°C pH of 5-7.5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a post-foamable composition and a discharge product. More specifically, the present invention relates to a post-foamable composition and a discharge product, in which cracks hardly occur in a synthetic resin container body even when stored for a long period of time, and a foaming agent is hardly separated.

  2. Description of the Related Art Conventionally, there has been known a discharge product filled with a post-foamable composition which is foamed by being appropriately sheared by hand after being discharged. Patent Literature 1 discloses that an outer bottle, a flexible inner bottle housed therein, the outer bottle and the inner bottle are closed, and the composition storage chamber between the outer bottle and the inner bottle communicates with the outside air. A valve assembly to be filled, a discharge composition filled in a composition storage chamber, and a pressurizing agent filled in a pressurized chamber in an inner bottle, wherein the discharge composition is undiluted and uniform in the undiluted solution. And a foaming agent dispersed in a dispensed product. Patent Document 2 discloses a method of producing a foamable aerosol product after gelling an emulsion by mixing a water-insoluble low-boiling organic liquid with an oil-in-water emulsion (stock solution) containing a soap comprising a higher fatty acid and an alkali agent. A method is disclosed.

JP-A-2006-196313 JP-A-1-210065

  However, the discharge product described in Patent Literature 1, for example, when filled with alkaline contents including an alkali agent described in Patent Literature 2 and stored for a long time, causes cracks in an outer bottle or inner bottle made of synthetic resin. Tends to occur.

  The present invention has been made in view of such a conventional problem, and can maintain a stable discharge state even when stored for a long period of time, and hardly causes cracks in a synthetic resin container body after foaming. It is an object to provide a water-soluble composition and a discharge product.

  The present invention for solving the above problems mainly includes the following configurations.

  (1) It is composed of a stock solution and a foaming agent, and has a viscosity at 5 ° C. of 10,000 mPa · s or more. The stock solution contains a surfactant and water, and has a pH at 25 ° C. of 5 to 7.5. Some post-foamable compositions.

  According to such a configuration, the post-foamable composition has a viscosity at 5 ° C. of 10,000 mPa · s or more. Therefore, when the post-foamable composition is discharged to the outside, foaming is suppressed and the composition becomes gel-like, and is foamed by appropriately applying shearing by hand or the like. The pH of the stock solution is adjusted to 5 to 7.5. Therefore, when the post-foamable composition is filled in, for example, a container body made of a synthetic resin, the container body is hardly deteriorated and cracks are hardly generated.

  (2) The post-foamable composition according to (1), wherein the surfactant includes a nonionic surfactant, and the nonionic surfactant includes a branched fatty acid ester.

  According to such a configuration, when the stock solution is mixed with the foaming agent, the viscosity rise becomes large. Therefore, the foaming agent is less likely to be separated from the discharged product even if stored for a long period of time, and a stable discharged state can be obtained. The stock solution may have a low viscosity before being mixed with the foaming agent. Therefore, the discharge product is easily manufactured.

  (3) The post-foamable composition according to (1) or (2), wherein the surfactant includes an amino acid-based surfactant.

  According to such a configuration, the post-foamable composition is more stable even when stored for a long time, the foaming agent is hardly separated, and the composition can be discharged with a uniform composition. Therefore, the post-foamable composition can be filled in a liquid-tight state when using a double container composed of an outer container and an inner container. Such a discharge product can be discharged in any direction, and there is no misuse.

  (4) The post-foamable composition according to any one of (1) to (3), wherein the stock solution contains a viscosity modifier.

  According to such a configuration, the post-foamable composition can stably disperse the foaming agent in a finer size, and is more stable even after long-term storage. As a result, the foamable composition after being discharged has excellent transparency.

  (5) A container body made of a synthetic resin filled with the post-foamable composition according to any one of (1) to (4) and a pressurizing agent, and a valve assembly attached to the container body. A discharge product, wherein the post-foamable composition is discharged under pressure by the pressurizing agent.

  According to such a configuration, the post-foamable composition has a viscosity at 5 ° C. of 10,000 mPa · s or more. Therefore, when the post-foamable composition is discharged to the outside, foaming is suppressed and the composition becomes gel-like, and is foamed by appropriately applying shearing by hand or the like. The pH of the stock solution is adjusted to 5 to 7.5. Therefore, the post-foamable composition hardly deteriorates the synthetic resin container body and hardly causes cracks.

  (6) The container main body includes an external container and an internal container having flexibility and accommodated in the external container, and a first accommodation chamber is formed between the external container and the internal container. A second storage chamber is formed in the internal container, and one of the first storage chamber and the second storage chamber is filled with the post-foamable composition, and the other is The discharge product according to (5), wherein the pressurizing agent is filled.

  According to such a configuration, not only the outer container made of a synthetic resin but also the inner container deformed by discharging the post-foamable composition is less likely to crack. For this reason, in the discharged product, the container is hardly damaged not only in appearance but also in the interior over a long period of time, and the quality is easily maintained.

  (7) The discharged product according to (6), wherein the post-foamable composition is filled in the first storage chamber, and the pressurizing agent is filled in the second storage chamber.

  Generally, an outer container made of a synthetic resin has a weak strength at a sharp angle portion on an inner surface or a portion which is a starting point of a thickness difference (particularly, a boundary portion between a neck portion and a shoulder portion), and is easily deteriorated by contents and cracks are easily generated. . However, according to such a configuration, the outer container is unlikely to crack even in such a low strength portion.

  (8) The discharge product according to (6) or (7), wherein the outer container is made of polyester.

  According to such a configuration, even if the external container is made of polyester, the discharge product is less likely to crack.

  ADVANTAGE OF THE INVENTION According to this invention, even if it preserve | saves for a long period, the stable discharge state can be maintained, and the post-foamable composition and a discharge product which hardly generate a crack in a container body made of synthetic resin can be provided.

FIG. 1 is a schematic cross-sectional view of a discharge product according to one embodiment (first embodiment) of the present invention. FIG. 2 is an enlarged cross-sectional view of a discharge product according to one embodiment (first embodiment) of the present invention. FIG. 3 is an enlarged cross-sectional view of a discharged product according to one embodiment (second embodiment) of the present invention.

<First embodiment>
An embodiment of the present invention, a post-foamable composition and a discharge product filled with the post-foamable composition will be described in detail with reference to the drawings. FIG. 1 is a schematic sectional view of a discharge product 1 of the present embodiment. FIG. 2 is an enlarged sectional view of the discharge product 1 of the present embodiment shown in FIG. The ejection product 1 shown in FIGS. 1 and 2 is in a state where no ejection operation is performed (non-ejection state). The discharge product 1 of the present embodiment mainly includes a container body 2 made of a synthetic resin filled with the post-foamable composition C and the pressurizing agent G, and a valve assembly 3 attached to the container body 2. The post-foamable composition C is composed of a stock solution and a foaming agent, and has a viscosity at 5 ° C. of 10,000 mPa · s or more. The stock solution contains a surfactant and water, and has a pH of 5 to 7.5 at 25 ° C. The discharge product 1 of the present embodiment presses and discharges the post-foamable composition C with the pressurizing agent G. Hereinafter, each will be described. Note that the discharged product of the present invention only needs to have a configuration capable of discharging the post-foamable composition C under pressure by the pressurizing agent G, and such a configuration is not particularly limited. Therefore, in the present embodiment, as an example, the container main body 2 is a double container including the external container 5 and the internal container 6 accommodated in the external container 5, and the post-foamable composition C is The discharged product filled and filled with the pressurizing agent G in the flexible inner container 6 will be described.

(Post-foamable composition C)
The post-foamable composition C is composed of a stock solution and a foaming agent, and has a viscosity at 5 ° C. of 10,000 mPa · s or more. The stock solution contains a surfactant and water, and has a pH of 5 to 7.5 at 25 ° C.

  The surfactant is blended to stably disperse the foaming agent in the post-foamable composition C. The surfactant causes the foaming agent to be held in the ejected material, and forms a foam by the foaming agent which is vaporized after the ejection.

  The surfactant is, for example, a nonionic surfactant, an anionic surfactant, an amphoteric surfactant, a silicone-based surfactant, or the like.

  The nonionic surfactant is not particularly limited. By way of example, nonionic surfactants include polyoxyethylene sorbitan fatty acid esters such as POE sorbitan triisostearate, POE sorbitan monostearate, POE sorbitan monooleate, and POE sorbitan monococoate, POE sorbit monolaurate, Polyoxyethylene sorbite fatty acid esters such as POE sorbit tetrastearate and POE sorbite tetraoleate, polyoxyethylene polyoxypropylene alkyl ethers such as POE POP cetyl ether, POE POP decyl tetradecyl ether, POE cetyl ether, POE stearyl Ether, POE oleyl ether, POE lauryl ether, POE behenyl ether, POE octyldodecyl ether, POE Polyoxyethylene alkyl ethers such as socetyl ether and POE isostearyl ether; polyethylene glycol fatty acid esters such as polyethylene glycol monostearate; polyoxyethylene hardened castor oil such as POE hardened castor oil; POE glyceryl monostearate; monooleic acid Polyoxyethylene glyceryl fatty acid esters such as POE glyceryl, polyoxyethylene alkyl ether fatty acid esters such as POE cetyl ether stearate and POE lauryl isostearate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, pentaglyceryl monolaurate, monomyristine Pentaglyceryl monoacrylate, pentaglyceryl monooleate, pentaglyceryl monostearate Monolaurate Dekaguruseriru, monomyristate decaglyceryl a monostearate decaglyceryl decaglyceryl monoisostearate, decaglyceryl monooleate, polyglycerol fatty acid esters such as mono-linoleic acid decaglyceryl like. Among them, the nonionic surfactant preferably contains a branched fatty acid ester such as polyoxyethylene sorbitan triisostearate, POE lauryl ether isostearate, and decaglyceryl monoisostearate. This increases the viscosity of the stock solution when mixed with the foaming agent. Therefore, the foaming agent is less likely to be separated from the discharged product even if stored for a long period of time, and a stable discharged state can be obtained. The stock solution may have a low viscosity before being mixed with the foaming agent. Therefore, the discharge product is easily manufactured.

  The content of the nonionic surfactant is not particularly limited. For example, the content of the nonionic surfactant is preferably 0.1% by mass or more, more preferably 0.3% by mass or more in the stock solution. Further, the content of the nonionic surfactant is preferably 10% by mass or less, more preferably 8% by mass or less in the stock solution. When the content of the nonionic surfactant is within the above range, the obtained post-foamable composition C tends to have the effect of increasing the viscosity when the stock solution is mixed with the foaming agent.

  Examples of the anionic surfactant include alkyl phosphates such as lauryl phosphate, alkyl phosphates such as potassium lauryl phosphate and sodium lauryl phosphate, polyoxyethylene alkyl ether phosphates such as POE lauryl ether phosphate, POE Polyoxyethylene alkyl ether phosphates such as sodium lauryl ether phosphate; polyoxyethylene alkyl ether acetic acid such as POE lauryl ether acetic acid; potassium ether POE lauryl ether acetate; alkyl ether acetates such as sodium POE lauryl ether acetate; ammonium lauryl sulfate; Alkyl sulfates such as potassium lauryl sulfate, sodium lauryl sulfate, triethanolamine lauryl sulfate, sodium cetyl sulfate, POE sodium lauryl ether sulfate, OE lauryl ether sulfate triethanolamine, POE alkyl ether sulfate, a polyoxyethylene alkyl ether sulfate or the like, such as POE alkyl ether triethanolamine sulfate.

  Anionic surfactants include coconut oil fatty acid sarcosine salts such as coconut oil fatty acid sarcosine triethanolamine, coconut oil fatty acid sarcosine sodium, N-coconut fatty acid acyl-L-glutamic acid triethanolamine, and N-coconut fatty acid acyl. -Potassium L-glutamate, N-coconut fatty acid acyl-sodium L-glutamate, N-lauroyl-L-glutamate triethanolamine, N-lauroyl-L-glutamate potassium, N-lauroyl-L-sodium glutamate, N-myristoyl N-acyl glutamates such as potassium L-glutamate, sodium N-myristoyl-L-glutamate, sodium N-stearoyl-L-glutamate, potassium N-coconut fatty acid acylglycine, and N-coconut fatty acid N- acyl glycine salt, such as Le sodium glycine, or an amino acid salt-based surfactant and the like, such as N- acylalanine salts such as N- cocoyl -DL- alanine triethanolamine.

  Among these, anionic surfactants are amino acid-based surfactants because the pH of the stock solution is easily adjusted, the long-term storage stability of the post-foamable composition C is easily improved, and the foaming agent is difficult to separate. , Preferably coconut oil fatty acid. In addition, an anionic surfactant may be used in combination.

  The content of the anionic surfactant is not particularly limited. For example, the content of the anionic surfactant in the stock solution is preferably 0.5% by mass or more, more preferably 1% by mass or more. Further, the content of the anionic surfactant is preferably 40% by mass or less, more preferably 35% by mass or less in the stock solution. When the content of the anionic surfactant is within the above range, the obtained post-foamable composition C is stable over a long period of time and is difficult to separate. Further, when the content of the anionic surfactant is within the above range, the foaming agent is easily held in the ejected matter. As a result, foaming immediately after ejection can be suppressed. Such a discharged material can be foamed by kneading or spreading the discharged material with a fingertip or the like to form a bubble.

  The amphoteric surfactant is not particularly limited. For example, amphoteric surfactants include lauryl dimethylaminoacetate betaine (lauryl betaine), stearyl betaine, lauric amide propyl betaine, lauryl hydroxysulfobetaine, stearyl dimethylaminoacetate betaine, dodecylaminomethyldimethylsulfopropyl betaine, octadecyl Alkyl betaines such as aminomethyldimethylsulfopropyl betaine, amide amidopropyl betaine, coconut fatty acid amidopropyldimethylaminoacetic acid betaine (cocamidopropyl betaine), fatty acid amidopropyl betaine such as cocamidopropyl hydroxysultaine, 2-alkyl- N-carboxymethyl-N-hydroxyethylimidazolinium betaine, sodium lauroylglutamate, lauroylglutamine Potassium, lauroyl methyl -β- alanine, lauryl dimethylamine N- oxide, oleyl dimethyl amine N- oxide, and the like.

  The silicone surfactant is not particularly limited. For example, silicone surfactants include polyoxyethylene / methylpolysiloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) / methylpolysiloxane copolymer, etc. It is.

  Water is formulated as the main solvent of the stock solution. Water is not particularly limited. As an example, the water is purified water, ion-exchanged water, or the like.

  The content of water is not particularly limited. For example, the content of water is preferably 30% by mass or more in the stock solution, and more preferably 40% by mass or more. Further, the content of water is preferably 95% by mass or less in the stock solution, more preferably 90% by mass or less. When the content of water is within the above range, components such as a surfactant are easily dissolved and dispersed sufficiently in the stock solution, and the viscosity of the obtained stock solution is likely to be about the same.

  The stock solution may optionally contain optional components other than the surfactant and water. Such optional components are, for example, pH adjusters, monosaccharides, polyhydric alcohols, monohydric alcohols, viscosity adjusters, oils, active ingredients and the like. These optional components may be used in combination.

  The pH adjuster is suitably blended to adjust the pH of the stock solution to 5 to 7.5. The pH adjuster is not particularly limited. For example, the pH adjuster is an acidic adjuster such as citric acid and trisodium citrate, and an alkaline adjuster such as triethanolamine and aminomethylpropanol. The content of the pH adjuster is not particularly limited. The content of the pH adjusting agent may be an amount suitable for adjusting the pH of the stock solution to 5 to 7.5.

  The monosaccharide is suitably blended for the purpose of, for example, stably dispersing the foaming agent in the post-foamable composition C. The monosaccharide is not particularly limited. As an example, monosaccharides include sugar alcohols such as sorbitol, erythritol, arabitol, galactitol, glucitol, maltitol, mannitol, xylitol, tetroses such as erythritol, D-erythrose, D-threose; D-arabinose, L-arabinose Pentoses such as arabinose, D-xylose, D-lyxose, L-lyxose, D-ribose, D-xylulose, L-xylulose, D-ribulose, L-ribulose, D-altrose, L-altrose, D Hexoses such as -galactose, L-galactose, D-glucose, D-talose, D-mannose, L-sorbose, D-tagatose, D-psicose, D-fructose, and D-mannose. Among these, even when the post-foamable composition C contains components whose stability is reduced at, for example, pH 5 to 7.5, the monosaccharides are separated or precipitated. Sugar alcohol is preferred because it is difficult to remove and the quality is easily maintained for a long period of time.

  When a monosaccharide is contained, the content of the monosaccharide is not particularly limited. For example, the content of the monosaccharide is preferably 1% by mass or more in the stock solution, more preferably 3% by mass or more. Further, the content of the monosaccharide is preferably 20% by mass or less in the stock solution, and more preferably 15% by mass or less. When the content of the monosaccharide is within the above range, even if the post-foamable composition C contains components whose stability is reduced at, for example, pH 5 to 7.5, those components are reduced. Are not easily separated or precipitated, and the quality is easily maintained for a long period of time.

  The polyhydric alcohol is suitably blended for the purpose of, for example, stably dispersing the blowing agent in the post-foamable composition C. The polyhydric alcohol is not particularly limited. As an example, the polyhydric alcohol is propylene glycol, 1,3-butylene glycol, hexylene glycol, dipropylene glycol, glycerin, or the like. Among these, the polyhydric alcohol can be separated from the post-foamable composition C even if the post-foamable composition C contains components whose stability is reduced at, for example, pH 5 to 7.5. From the viewpoint that precipitation hardly occurs and quality is easily maintained for a long period of time, a divalent to trivalent alcohol is preferable.

  When a polyhydric alcohol is contained, the content of the polyhydric alcohol is not particularly limited. For example, the content of the polyhydric alcohol is preferably 1% by mass or more in the stock solution, more preferably 3% by mass or more. Further, the content of the polyhydric alcohol is preferably 20% by mass or less in the stock solution, more preferably 15% by mass or less. When the content of the polyhydric alcohol is within the above range, even if the post-foamable composition C contains components whose stability is reduced at, for example, pH 5 to 7.5, those components may be used. The components are not easily separated or precipitated, and the quality is easily maintained for a long period of time.

  The monohydric alcohol is appropriately blended as an auxiliary solvent for dissolving the active ingredient that is hardly soluble in water, or for the purpose of adjusting the foaming property of the ejected material. The monohydric alcohol is not particularly limited. As an example, the monohydric alcohol is a monohydric alcohol having 2 to 5 carbon atoms, such as ethanol and isopropanol.

  When a monohydric alcohol is contained, the content of the monohydric alcohol is not particularly limited. For example, the content of the monohydric alcohol is preferably 1% by mass or more in the stock solution, more preferably 3% by mass or more. Further, the content of the monohydric alcohol is preferably 20% by mass or less in the stock solution, more preferably 15% by mass or less. When the content of the monohydric alcohol is within the above range, even when an active ingredient that is difficult to dissolve in water is contained, the active ingredient tends to be appropriately dissolved in the stock solution.

  The viscosity modifier is suitably blended for the purpose of adjusting the viscosity of the stock solution or the post-foamable composition C, and stably dispersing the foaming agent in the post-foamable composition C. The viscosity modifier is not particularly limited. As an example, the viscosity modifier is an acrylic acid polymer such as (Acrylates / alkyl acrylate (C10-30)) crosspolymer, celluloses such as hydroxyethylcellulose, gums such as xanthan gum, and the like.

  When a viscosity modifier is included, the content of the viscosity modifier is not particularly limited. For example, the content of the viscosity modifier is preferably 0.01% by mass or more in the stock solution, more preferably 0.03% by mass or more. The content of the viscosity modifier is preferably 3% by mass or less in the stock solution, more preferably 2% by mass or less. When the content of the viscosity modifier is within the above range, the viscosity of the stock solution or the post-foamable composition C is easily adjusted appropriately, and the foaming agent is stable in a fine size in the post-foamable composition C. Easy to be dispersed. As a result, the post-foamable composition has high transparency.

  The oil component is appropriately blended for the purpose of adjusting the hardness of the foam and the ease of spreading. The oil content is not particularly limited. For example, oils include cetyl alcohol, myristyl alcohol, stearyl alcohol, higher alcohols such as behenyl alcohol, isopropyl myristate, isopropyl palmitate, decyl oleate, isostearyl laurate, isocetyl myristate, isostearyl myristate, myristine. Octyl dodecyl acid, octyl palmitate, octyl stearate, octyl dodecyl oleate, ethyl isostearate, cetyl isooctanoate, ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol dioleate, glyceryl tricaprylate, triglycol (Caprylic / capric acid) glyceryl, glyceryl triisostearate, tri2-ethyl Ester oils such as trimethylolpropane hexanoate, octyldodecyl neopentanoate, hexyldecyl dimethyloctanoate, cetyl lactate, triethyl citrate, dioctyl succinate, diisopropyl adipate, diethoxyethyl succinate, olive oil, avocado oil, camellia oil , Turtle oil, macadamia nut oil, corn oil, mink oil, rapeseed oil, sesame oil, castor oil, linseed oil, safflower oil, jojoba oil, malt oil, palm oil, palm oil and other oils, liquid paraffin, isoparaffin, squalene, Hydrocarbon oils such as squalane; and silicone oils such as methylpolysiloxane, methylphenylpolysiloxane, and cyclopentasiloxane.

  When an oil component is contained, the content of the oil component is not particularly limited. For example, the content of the oil component is preferably 0.5% by mass or more in the stock solution, more preferably 1% by mass or more. The oil content is preferably 20% by mass or less, more preferably 15% by mass or less in the stock solution. When the oil content is within the above range, the hardness of the foam and the ease of spreading can be easily adjusted appropriately.

  The active ingredient can be appropriately selected and blended depending on the use and purpose. The active ingredient is not particularly limited. To give an example, the active ingredient is a humectant such as hyaluronic acid, a refreshing agent such as l-menthol, an acne therapeutic agent such as adapalene, a resorcinol, a keratin softener such as urea, an anti-inflammatory agent such as dipotassium glycyrrhizinate, Vitamins such as vitamin E, bactericides such as isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, preservatives such as paraoxybenzoate, phenoxyethanol, p-phenylenediamine, p-aminophenol, o-phenylenediamine, o -Oxidation dyes composed of aminophenol and derivatives thereof, various extracts, flavors and the like.

  Note that the content of the active ingredient may be an amount that can achieve a desired use or purpose.

  Returning to the description of the whole stock solution, the content of the stock solution is not particularly limited. For example, the content of the stock solution in the post-foamable composition C is preferably 90% by mass or more, and more preferably 92% by mass or more. Further, the content of the stock solution in post-foamable composition C is preferably 99.5% by mass or less, and more preferably 99% by mass or less. When the content of the undiluted solution is less than 90% by mass, the foaming agent tends to be easily separated, and it tends to be difficult to discharge a uniform composition. On the other hand, when the content of the undiluted solution exceeds 99.5% by mass, the post-foamable composition C tends to have insufficient foamability and is difficult to spread.

  The pH of the stock solution at 25 ° C. may be 5 or more, and is preferably 5.2 or more. The pH of the stock solution at 25 ° C. may be 7.5 or less, and preferably 7 or less. When the pH of the undiluted solution is less than 5, the post-foamable composition C tends to cause irritation on the application surface such as the skin. On the other hand, when the pH of the stock solution exceeds 7.5, the post-foamable composition C tends to cause cracks in the synthetic resin container body.

  The method for preparing the stock solution is not particularly limited. The stock solution can be prepared by a conventionally known method. For example, an undiluted solution can be prepared by adding a surfactant or any active ingredient to water or warm water, and adjusting the pH of the undiluted solution to 5 to 7.5 with an amino acid-based surfactant or a pH adjuster. . The viscosity of the stock solution is, for example, 100 to 10,000 mPa · s at 5 ° C., and preferably 200 to 9,000 mPa · s. In addition, the viscosity of the stock solution can be measured with a B-type rotational viscometer.

  The foaming agent is emulsified with the undiluted solution to thicken the post-foamable composition C, suppress volatilization immediately after ejection, maintain a gel state, and apply a shear to the ejected gel substance with a finger or the like. It is compounded in order to volatilize and foam the gel-like material when it is discharged.

  The foaming agent is not particularly limited. As an example, the blowing agent may be an aliphatic hydrocarbon having 3 to 4 carbon atoms such as normal butane, isopentane or normal pentane, or a boiling point of 5 to 30 such as 1-chloro-3,3,3-trifluoropropene. ° C hydrofluoroolefin.

  The content of the foaming agent is not particularly limited. For example, the content of the foaming agent in the post-foamable composition C is preferably 0.5% by mass or more, and more preferably 1% by mass or more. Further, the content of the foaming agent in the post-foamable composition C is preferably 10% by mass or less, more preferably 8% by mass or less. When the content of the foaming agent is less than 0.5% by mass, the post-foamable composition C tends to have insufficient foamability after being discharged, making it difficult to spread. On the other hand, when the content of the blowing agent exceeds 10% by mass, the blowing agent is easily separated from the stock solution. As a result, the post-foamable composition C tends not to be discharged with a uniform composition, and the separated foaming agent tends to be discharged in a liquid state.

  Returning to the description of the entire post-foamable composition C, the method for preparing the post-foamable composition C is not particularly limited. As an example, the post-foamable composition C can be prepared, for example, by mixing a stock solution cooled to 10 ° C. or lower with a blowing agent cooled to a boiling point or lower.

  The viscosity of the post-foamable composition C at 5 ° C. may be 10,000 mPa · s or more, and is preferably 15,000 mPa · s or more. The viscosity of the post-foamable composition C can be measured with a B-type viscometer in a state where the stock solution cooled by the above method and the foaming agent are mixed and adjusted to 5 ° C. When the viscosity of the post-foamable composition C is lower than 10,000 mPa · s, the post-foamable composition C is easily discharged in a partially foamed state, and foams before applying shearing with a finger or the like. It will be easier.

  As described above, the post-foamable composition C of the present embodiment has a moderately increased viscosity by mixing the undiluted solution and the foaming agent, and can stably contain the foaming agent. And the gel state can be maintained.

  Returning to the description of the entire discharge product 1, the discharge product 1 of the present embodiment is attached to the container body 2 made of a synthetic resin filled with the foaming composition C and the pressurizing agent G described above, and attached to the container body 2. And a valve assembly 3 provided. The discharge product 1 pressurizes and discharges the post-foamable composition C with the pressurizing agent G.

(Container body 2)
The container body 2 includes an external container 5 filled with the post-foamable composition C, and an internal container 6 housed in the external container 5 and filled with the pressurizing agent G. The inner container 6 has flexibility.

・ External container 5
The outer container 5 has a pressure-resistant bottomed cylindrical shape, and has a bottom, a cylindrical body, a shoulder 51 tapering in diameter from the upper end of the body, and a cylindrical neck extending from the upper end. 52, and a mouth at the upper end thereof. A screw for attaching a cover cap 31 described later is formed on the outer periphery of the neck portion 52.

  The material of the outer container 5 is not particularly limited. Examples of such materials include various synthetic resins such as polyesters such as polyethylene terephthalate, polyethylene naphthalate and polycyclohexane dimethylene terephthalate, polyamides such as nylon, and polyolefins such as polyethylene. Among them, the material of the outer container 5 is preferably polyester from the viewpoint that the remaining amount of the contents is easily understood and the effect of the present embodiment (the effect of suppressing the occurrence of cracks) is more easily achieved.

・ Inner container 6
The inner container 6 is a container housed in the outer container 5. Further, the inner container 6 is a flexible bag that can be appropriately expanded and contracted by a pressure difference. In the discharge product 1 of the present embodiment, the space (the first storage chamber S1) between the inner container 6 and the outer container 5 is filled with the post-foamable composition C, and the space inside the inner container 6 (the second storage chamber). S2) is filled with the pressurizing agent G.

  The inner container 6 has a bottom, a cylindrical body, a shoulder tapered from the upper end of the body, a cylindrical neck extending from the upper end, a mouth at the upper end, and a mouth. And a flange portion 61 extending outward in the radial direction. In addition, as shown in FIG. 1, a groove 62 for communicating the first storage chamber S <b> 1 with the outside is formed in the inner container 6 from the lower surface of the flange 61 to the boundary between the neck and the shoulder. I have. A plurality of grooves 62 are formed in the circumferential direction, and constitute a discharge path when the post-foamable composition C is discharged to the outside. A valve assembly 3 described below is attached to the mouth.

  Such an inner container 6 is made of a synthetic resin such as a polyester such as polyethylene terephthalate, polyethylene naphthalate, or polycyclohexane dimethylene terephthalate, a polyamide such as nylon, or a polyolefin such as polyethylene or polypropylene, and has flexibility by biaxial stretching blow or the like. It is molded as follows. The outer container 5 and the inner container 6 may be made of the same material or different materials. Further, the outer container 5 and the inner container 6 may be blow-molded at the same time. In the present embodiment, “flexibility” refers to a property of being deformed by the pressure of the pressurizing agent. When the post-foamable composition C is filled in the first storage chamber S1, it contracts, and the It refers to the property of being deformable to return to the original shape when the composition C is discharged.

  In the container body 2 of the present embodiment, the outer container 5 and the inner container 6 are formed by, for example, biaxial stretch blow molding. At this time, the outer container 5 is also expanded in the horizontal direction while the lower part of the neck part is extended in the axial direction, and the part extending from the lower end of the neck part 52 to the shoulder part 51 becomes a starting point to be extended by molding, and the thickness difference Easily occur, and the angle becomes further acute. For this reason, the strength of the outer container 52 particularly at the boundary portion (boundary portion P1) between the shoulder portion 51 and the neck portion 52 tends to decrease. As a result, conventionally, when the discharged product is stored for a long time in a state in which the contents are filled, cracks tend to occur at the boundary portion P1. In particular, when the alkaline contents are stored for a long period of time, the outer container 5 made of a synthetic resin is liable to crack particularly at the boundary portion P1. However, in the discharge product 1 of the present embodiment, the pH of the content (the undiluted solution of the post-foamable composition C) is adjusted to 5 to 7.5. Therefore, the outer container 5 is hardly deteriorated by the post-foamable composition C and hardly cracked even in the boundary portion P1 where the strength is inferior to other portions. Note that the inner container 6 has a smaller rate of elongation during molding than the outer container 5. However, the internal container 6 made of a synthetic resin similarly has a tendency to crack at the boundary between the shoulder and the neck when the alkaline content is stored for a long time in a state where the content is in contact with the alkaline container. The discharge product of the present embodiment hardly causes cracks in such an inner container 6 as in the outer container 5.

・ Pressure agent G
The pressurizing agent G is a propellant for pressing the foamable composition C after being filled in the external container 5 and discharging the composition to the outside. As the pressurizing agent G, a compressed gas such as carbon dioxide gas, nitrogen gas, compressed air, oxygen gas, and nitrous oxide gas is exemplified.

  The pressure of the pressurizing agent G is not particularly limited as long as it can press the foamable composition C after being filled in the external container 5 and discharge the composition to the outside. For example, the pressure of the pressurizing agent G is preferably such that the pressure at 20 ° C. in the outer container 5 is 0.2 MPa or more, and more preferably 0.3 MPa or more. Further, the pressure of the pressurizing agent G is preferably such that the pressure at 20 ° C. in the outer container 5 is 1.0 MPa or less, and more preferably 0.8 MPa or less. By filling the inner container 6 so that the pressure of the pressurizing agent G becomes 0.2 to 1.0 MPa, the discharge product 1 is made to have a post-foaming property in the outer container 5 when the valve assembly 3 is opened. The composition C can be appropriately pressed through the outer peripheral surface of the inner container 6. As a result, the post-foamable composition C is urged to be taken into the housing 35 of the valve assembly 3 described below. Thereafter, the post-foamable composition C passes through the intra-stem passage 82, is sent to the discharge member 4, and is discharged.

(Valve assembly 3)
The valve assembly 3 is a member for closing the openings of the outer container 5 and the inner container 6 and sealing the outer container 5 and the inner container 6. The valve assembly 3 includes a cover cap 31 fixed to close the openings of the outer container 5 and the inner container 6, a valve body 32 held by the cover cap 31 and held at a predetermined position in the outer container 5, Mainly equipped.

  The cover cap 31 is a member for attaching the valve assembly 3 to the outer container 5 and the inner container 6. The cover cap 31 has a cap body 33 that holds the valve body 32, and a substantially cylindrical edge 34 that extends downward at the outer peripheral edge of the cap body 33. The cap body 33 has an insertion hole through which a stem 8 described later is inserted at the center. On the inner surface of the edge portion 34, a screw is formed which is screwed with a screw formed on the outer peripheral surface of the neck portion 52 of the outer container 5.

  The valve body 32 includes a housing 35, a stem 8 having a stem hole 81 communicating the inside and the outside of the external container 5, a stem rubber 36 attached around the stem hole 81, and closing the stem hole 81. Mainly equipped.

  The housing 35 is a member in which the stem 8 is housed. The housing 35 mainly includes a substantially cylindrical tubular portion 351 having an open upper portion, and a flange portion 352 extending radially outward from the upper end of the tubular portion 351. An elastic member 37 made of resin for urging the stem 8 upward is formed on the inner bottom surface of the cylindrical portion 351. The flange portion 352 includes a disk-shaped top surface portion, an upper surface side extension portion 353 extending upward from the upper surface of the top surface portion, and a lower side extension portion 354 extending downward from the lower surface. A communication hole 38 that communicates the inside of the housing 35 and the first storage chamber S1 between the external container 5 and the internal container 6 is formed in the upper surface side extension 353. The lower extension 354 is a substantially cylindrical portion. An annular holding groove for holding an O-ring is formed on the outer peripheral surface of the lower extension 354, and the O-ring is radially compressed between the holding groove and the inner peripheral surface of the inner container 6 to seal the O-ring. are doing.

  The stem 8 is a substantially cylindrical portion, and has an intra-stem passage 82 through which the foamable composition C passes after being taken into the housing 35 at the time of discharge. A stem hole 81 is formed near the lower end of the intra-stem passage 82 for communicating the space in the housing 35 with the intra-stem passage 82.

  The stem hole 81 is closed by the inner peripheral surface of the stem rubber 36 during non-ejection. The upper end of the stem 8 is open at the upper end of the intra-stem passage 82. A discharge member 4 for discharging the post-foamable composition C is attached to the upper end of the stem 8.

One or more stem holes 81 may be provided. Further, the sectional area of the stem hole 81 is not particularly limited. For example, the cross-sectional area of the stem hole 81 is 0.1 mm ² or more, and more preferably 0.15 mm ² or more. Further, the sectional area of the stem hole 81 is 2 mm ² or less, and more preferably 1.5 mm ² or less. When the cross-sectional area of the stem hole 81 is within the above range, the post-foamable composition C is smoothly discharged even at a low temperature.

  The stem rubber 36 is a member that is attached around the stem hole 81 and that appropriately blocks the internal space of the housing 35 from the outside. The stem rubber 36 is a disc-shaped member having an insertion hole through which the stem 8 is inserted at the center. The inner diameter of the stem rubber 36 is slightly smaller than the outer diameter of a portion of the stem 8 where the stem hole 81 is formed. The stem hole 81 is closed by making close contact with the surface. The vicinity of the outer periphery of the stem rubber 36 is sandwiched between an upper portion of the cylindrical portion 351 of the housing 35 and a lower portion of the cover cap 31. Thus, the stem rubber 36 is properly positioned in the valve assembly 3.

  The elastic member 37 is a plate member made of synthetic resin that is held in a compressed state in the housing 35 and acts as a spring. The elastic member 37 is composed of four protruding pieces extending upward from the inner bottom surface of the cylindrical portion 351. The upper end of each protruding piece is in contact with the bottom surface of the stem 8. The elastic member 37 urges the stem 8 upward during non-ejection. Further, each protruding piece constituting the elastic member 37 is made of resin, and can be easily deformed when the stem 8 is pushed down. In addition, the elastic member 37 may be a metal spring generally used in the valve assembly 3 instead of the plate member made of synthetic resin.

(Discharge member 4)
The discharge member 4 is a member for discharging the post-foamable composition C, and is attached to an upper end of the stem 8. The ejection member 4 mainly includes a nozzle unit 41 and an operation unit 42 operated by a user with a finger or the like. The nozzle portion 41 is a substantially cylindrical portion, and has a discharge passage 44 through which the post-foamable composition C passes. An opening (discharge hole 43) is formed at the tip of the discharge passage 44. The post-foamable composition C is discharged from the discharge holes 43.

In the present embodiment, the cross-sectional area of the discharge hole 43 is preferably 0.7 mm ² or more, and more preferably 1 mm ² or more. Further, the sectional area of the discharge hole 43 is preferably 60 mm ² or less, more preferably 55 mm ² or less. When the cross-sectional area of the discharge hole 43 is within the above range, the post-foamable composition C is less likely to be clogged and is easily discharged.

  In the present embodiment, the shape and length of the ejection hole 43 are not particularly limited. The shape of the discharge hole 43 may be a substantially circular shape, a substantially square shape, or the like. In the present embodiment, the discharge hole 43 including one substantially circular opening is illustrated.

  In the discharge product 1 of the present embodiment, when the discharge member 4 is pressed down, the stem 8 of the valve assembly 3 is pressed down. Thereby, the stem rubber 36 bends downward, and the stem hole 81 is opened. As a result, the inside of the first storage chamber S1 between the outer container 5 and the inner container 6 communicates with the outside.

  When the inside of the first storage chamber S1 communicates with the outside, the pressurizing agent G filled in the second storage chamber S2 of the internal container 6 causes the outer peripheral surface of the flexible internal container 6 to move from the inside to the outside. To expand. Thereby, the foamable composition C after being filled in the first storage chamber S1 between the outer container 5 and the inner container 6 is pressurized. As a result, the post-foamable composition C passes through the groove 62 and the communication hole 38, is taken into the housing 35, and then passes through the stem hole 81 and the passage 82 in the stem, and is sent to the discharge member 4. After being taken into the discharge member 4, the foamable composition C passes through the discharge passage 44, and is thereafter discharged from the discharge hole 43.

  As described above, according to the discharge product 1 of the present embodiment, the post-foamable composition C is foamed by being appropriately sheared by hand or the like after being discharged by being pressed by the pressurizing agent G. The pH of the stock solution is adjusted to 5 to 7.5. Therefore, the outer container 5 and the inner container 6 made of synthetic resin are hardly deteriorated by the post-foamable composition C, and are hardly cracked.

<Second embodiment>
A discharge product according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is an enlarged cross-sectional view of the discharge product 1a of the present embodiment. The ejection product 1a shown in FIG. 3 is in a state where no ejection operation is performed (non-ejection state). In the discharge product 1a of the present embodiment, the pressurizing agent G is filled in the first storage chamber S1 between the outer container 5 and the inner container 6, and the post-foamable composition C is used for the inner container 6 having flexibility. It has the same configuration as the discharge product 1 of the above-described first embodiment (see FIG. 1) except that the second storage chamber S2 is filled and the structure of the valve assembly 3a is different. Therefore, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

(Valve assembly 3a)
The valve assembly 3a is a member for closing the openings of the outer container 5 and the inner container 6 to seal the outer container 5 and the inner container 6, and mainly includes a cover cap 31 and a valve body 32.

  The valve body 32 includes a housing 35a, a stem 8 having a stem hole 81 communicating the inside and the outside of the inner container 6, a stem rubber 36 attached around the stem hole 81, and closing the stem hole 81. Mainly equipped.

  The housing 35a mainly includes a substantially cylindrical tubular portion 351a having an open upper portion, and a flange portion 352a extending radially outward from an upper end of the tubular portion 351a. The flange portion 352a includes a disk-shaped top surface portion, an upper surface side extension portion 353a extending upward from the upper surface of the top surface portion, and a lower side extension portion extending downward from the lower surface. In the discharge product 1a of the present embodiment, the first storage chamber S1 between the outer container 5 and the inner container 6 is filled with the pressurizing agent G. Therefore, the communication hole 38 (see FIG. 2) formed in the discharge product 1 of the first embodiment is not formed in the upper surface side extension 353 a so that the pressurizing agent G does not leak to the outside. .

  An elastic member 37 made of resin for urging the stem 8 upward is formed on the inner bottom surface of the cylindrical portion 351a. The elastic member 37 is a plate member made of a synthetic resin that is held in a compressed state in the housing 35a and acts as a spring. The elastic member 37 is composed of four protruding pieces extending upward from the inner bottom surface of the cylindrical portion 351a. Each protruding piece constituting the elastic member 37 is made of resin, and can be easily deformed by pushing down the stem 8. Further, a through hole 39 penetrating in the thickness direction is formed on the inner bottom surface of the cylindrical portion 351a. The through hole 39 is a hole for taking in the foamable composition C filled in the second storage chamber S2 of the internal container 6 into the housing 35a at the time of discharge.

  The stem 8 is a substantially cylindrical portion, and has an intra-stem passage 82 through which the foamable composition C passes after being taken into the housing 35a at the time of discharge. A stem hole 81 is formed near the lower end of the intra-stem passage 82 for communicating the space in the housing 35a with the intra-stem passage 82.

  In the discharge product 1a of the present embodiment, the first storage chamber S1 between the outer container 5 and the inner container 6 is filled with the pressurizing agent G. Therefore, when the ejection member 4 is pushed down during ejection, the stem 8 of the valve assembly 3a is pushed down. Thereby, the stem rubber 36 bends downward, and the stem hole 81 is opened. As a result, the inside of the second storage chamber S2 of the inner container 6 communicates with the outside. When the inside of the second storage chamber S2 communicates with the outside, the pressurizing agent G filled in the first storage chamber S1 presses the inner peripheral surface of the flexible inner container 6 from the outside to the inside. Is done. Thus, the foamable composition C after being filled in the second storage chamber S2 of the inner container 6 is pressurized. As a result, the post-foamable composition C passes through the through-hole 39 and is taken into the housing 35a, and then passes through the gap between the protruding pieces of the elastically deformed elastic member 37 to form the stem hole 81 and the passage in the stem. 82, and is sent to the ejection member 4. After being taken into the discharge member 4, the foamable composition C passes through the discharge passage 44, and is thereafter discharged from the discharge hole 43.

  In the discharge product 1a of the present embodiment, the post-foamable composition C is filled in the second storage chamber S2 of the inner container 6, and the inner container 6 is made of a flexible synthetic resin or the like. When manufacturing such a discharge product 1a, the inner container 6 opens the stem 8 before filling with the post-foamable composition C, and contracts using the pressure of the pressurizing agent G. Thereafter, the inner container 6 is filled with the post-foamable composition C and returned to its original shape. At this time, the inner container 6 has a bent portion. When the post-foamable composition C is discharged, the inner container 6 contracts due to the pressure of the pressurizing agent G. Since the inner container 6 is made of a synthetic resin, it is easily bent. These bent portions are easily deteriorated by the post-foamable composition C. However, in the discharge product 1a of the present embodiment, the pH of the stock solution is adjusted to 5 to 7.5. Therefore, in the inner container 6 made of a synthetic resin, a portion bent by the post-foamable composition C is hardly deteriorated, and a crack is hardly generated.

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to these examples.

(Example 1)
A foaming agent cooled to 5 ° C was added to the stock solution 1 cooled to 5 ° C shown in the following formulation and mixed to prepare a post-foamable composition. The cover cap of the valve assembly is attached to the container main body shown in FIG. 1 so as to be in a temporarily fitted state, a pressurizing agent (nitrogen gas) is filled from a gap between the container main body and the cover cap, and the cover cap is screwed and sealed. . The stem is pushed down to discharge the nitrogen gas in the first storage chamber and expand the inner container to reduce the volume of the first storage chamber. Thereafter, the post-foamable composition is charged from the stem into the first storage chamber and discharged. Manufactured product.
<Stock solution 1>
Coconut oil fatty acid sarcosine triethanolamine 30% aqueous solution (* 1) 10.0
Lauryl phosphoric acid / polyoxyethylene lauryl ether acetic acid 20.0
/ Dipropylene glycol / potassium hydroxide / purified water (* 2)
Polyoxyethylene sorbitan triisostearate (* 3) 3.0
Cocamidopropyl betaine (* 4) 3.0
Sorbitol (* 5) 10.0
Dipropylene glycol (* 6) 10.0
Methyl paraben 0.1
Purified water 43.5
Citric acid 0.3
Trisodium citrate 0.1
Total 100.0 (% by mass)
* 1: Neoscope SCT-30 (trade name), manufactured by Toho Chemical Industry Co., Ltd. * 2: Priory B300D (trade name), manufactured by Kao Corporation * 3: Leodol IS399C (trade name), manufactured by Kao Corporation * 4: Levon 2000HG (trade name), manufactured by Sanyo Chemical Industry Co., Ltd. * 5: Sorbitol Kao (trade name), manufactured by Kao Corporation * 6: DPG-RF (trade name), manufactured by ADEKA <Post-foaming property Composition>
Undiluted solution 1 95.0
Blowing agent (isopentane) 5.0
Total 100.0 (% by mass)

(Example 2)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 1 was used in an amount of 97.0% by mass and isopentane in an amount of 3.0% by mass.

(Example 3)
A discharged product was manufactured in the same manner as in Example 1, except that the stock solution 1 was used in an amount of 92.0% by mass and isopentane was used in an amount of 8.0% by mass.

(Example 4)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 2 shown in the following formulation was used.
<Undiluted solution 2>
Lauryl phosphoric acid / polyoxyethylene lauryl ether acetic acid 20.0
/ Dipropylene glycol / potassium hydroxide / purified water (* 2)
Polyoxyethylene sorbitan triisostearate (* 3) 3.0
30% aqueous solution of cocoyl glutamate triethanolamine (* 7) 10.0
Cocamidopropyl betaine (* 4) 3.0
Sorbitol (* 5) 10.0
Dipropylene glycol (* 6) 10.0
Methyl paraben 0.1
Purified water 43.9
Total 100.0 (% by mass)
* 7: Amisoft CT-12S (trade name), manufactured by Ajinomoto Healthy Supply Co., Ltd.

(Example 5)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 3 shown in the following formulation was used.
<Stock solution 3>
Polyoxyethylene sorbitan triisostearate (* 3) 3.0
30% aqueous solution of cocoyl glutamate triethanolamine (* 7) 30.0
Cocamidopropyl betaine (* 4) 3.0
Sorbitol (* 5) 10.0
Dipropylene glycol (* 6) 10.0
Methyl paraben 0.1
Purified water 43.9
Total 100.0 (% by mass)

(Example 6)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 4 shown in the following formulation was used.
<Undiluted solution 4>
Lauryl phosphoric acid / polyoxyethylene lauryl ether acetic acid 10.0
/ Dipropylene glycol / potassium hydroxide / purified water (* 2)
Polyoxyethylene sorbitan triisostearate (* 3) 3.0
30% aqueous solution of cocoyl glutamate triethanolamine (* 7) 30.0
Cocamidopropyl betaine (* 4) 3.0
Sorbitol (* 5) 10.0
Dipropylene glycol (* 6) 10.0
Methyl paraben 0.1
Purified water 33.9
Total 100.0 (% by mass)

(Example 7)
A discharged product was manufactured in the same manner as in Example 1, except that the stock solution 5 shown in the following formulation was used.
<Undiluted solution 5>
Polyoxyethylene sorbitan triisostearate (* 3) 1.0
30% aqueous solution of cocoyl glutamate triethanolamine (* 7) 30.0
Cocamidopropyl betaine (* 4) 3.0
Methyl paraben 0.1
Purified water 33.1
(Acrylates / alkyl acrylate (C10-30)) 0.8
Cross polymer (* 8)
Sodium hydroxide 1% aqueous solution 32.0
Total 100.0 (% by mass)
* 8: Carbopol SC-500 (trade name), manufactured by Lubrizol

(Example 8)
The cover cap of the valve assembly is attached to the container body shown in FIG. 3 so as to be in a temporarily fitted state, a pressurizing agent (nitrogen gas) is filled from a gap between the container body and the cover cap, and the cover cap is screwed and sealed. . The stem is pushed down to discharge the nitrogen gas in the second storage chamber, thereby contracting the inner container to reduce the volume of the second storage chamber. Thereafter, the post-foamable composition of Example 1 is placed in the second storage chamber from the stem. Filled and ejected products were manufactured.

(Comparative Example 1)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 6 shown in the following formulation was used.
<Undiluted solution 6>
Lauryl phosphoric acid / polyoxyethylene lauryl ether acetic acid 20.0
/ Dipropylene glycol / potassium hydroxide / purified water (* 2)
30% aqueous solution of cocoyl glutamate triethanolamine (* 7) 30.0
Sorbitol (* 5) 10.0
Dipropylene glycol (* 6) 10.0
Methyl paraben 0.1
Purified water 29.9
Total 100.0 (% by mass)

(Comparative Example 2)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 7 shown in the following formulation was used.
<Stock solution 7>
Cocoylglycine potassium 30% aqueous solution (* 9) 30.0
Cocamidopropyl betaine (* 4) 3.0
Methyl paraben 0.1
Purified water 34.1
(Acrylates / alkyl acrylate (C10-30)) 0.8
Cross polymer (* 8)
Sodium hydroxide 1% aqueous solution 32.0
Total 100.0 (% by mass)
* 9: Amilite GCK-12K (trade name), manufactured by Ajinomoto Healthy Supply Co., Ltd.

(Comparative Example 3)
A discharged product was manufactured in the same manner as in Example 1 except that the stock solution 8 shown in the following formulation was used.
<Stock solution 8>
Palmitic acid 6.8
Myristic acid 1.0
POE (2) cetyl ether (* 10) 1.0
Coconut oil fatty acid diethanolamide (* 11) 5.0
Glycerin 10.0
Sorbitol 5.0
Methyl paraben 0.1
Purified water 66.9
Triethanolamine 4.2
Total 100.0 (% by mass)
* 10: NIKKOL BC-2 (trade name), manufactured by Nikko Chemicals Co., Ltd. * 11: Amizole CDE (trade name), manufactured by Kawaken Fine Chemical Co., Ltd.

  Using the discharge products prepared in Examples 1 to 8 and Comparative Examples 1 to 3, the following evaluation methods were used to evaluate the pH of the stock solution, the stability of the post-foamable composition, the state of the discharge, and the container stability. . Table 1 shows the results.

(Evaluation item)
1) pH of stock solution
The stock solution was adjusted to 25 ° C. and measured with a pH meter.

2) Viscosity of stock solution The stock solution was adjusted to 5 ° C and measured with a B-type rotational viscometer.

3) Viscosity of post-foamable composition A foaming agent was added to the stock solution and mixed to prepare a post-foamable composition, which was adjusted to 5 ° C and measured with a B-type viscometer.

4) Stability of post-foamable composition The discharged product was stored in a thermostat at 25 ° C for 3 months, and the appearance of the post-foamable composition was evaluated according to the following evaluation criteria.
(Evaluation criteria)
：: The post-foamable composition was colorless and transparent without the foaming agent being separated.
〇: The post-foamable composition was translucent with no foaming agent separated.
Δ: The foaming agent was slightly separated from the post-foamable composition.
×: In the post-foamable composition, a foaming agent separated in the upper layer was confirmed.

5) State of ejected material The post-foamable composition was ejected from the ejected product stored at 25 ° C. for 3 months to the palm, and the state of the ejected material was evaluated according to the following evaluation criteria.
◎: The post-foamable composition was discharged in a firm gel form, easily spread, and then slowly foamed.
〇: The post-foamable composition was discharged in a gel state, easily spread, and then slowly foamed.
Δ1: The post-foamable composition was discharged in a firm gel state, but the separated foaming agent was discharged in a liquid state.
Δ2: The post-foamable composition was discharged in a loose gel form, but a part of the composition was foamed.
× 1: In the post-foamable composition, the foaming agent was separated and discharged.
× 2: The post-foamable composition was discharged in a state where gel and foam were mixed.

6) Container stability The entire post-foamable composition was discharged from the discharged product stored at 40 ° C for 3 months, and the appearance of the container body was evaluated according to the following evaluation criteria.
〇: No abnormality was found in the appearance of the container body.
×: Many cracks extending in the vertical direction were confirmed at the boundary between the neck and the shoulder in the container body.

  As shown in Table 1, all of the discharged products of Examples 1 to 8 were excellent in container stability and hardly caused cracks. In addition, in the ejected products of Examples 1 to 8, the post-foamable composition was hard to be separated, could be ejected in a gel form, and could be foamed by spreading.

  On the other hand, the ejection product of Comparative Example 1 in which the viscosity of the post-foamable composition was low was poor in stability, and the foaming agent was separated. In the discharge product of Comparative Example 1, the separated foaming agent was discharged. In the case of the discharged product of Comparative Example 2 in which the viscosity of the post-foamable composition was low and the pH exceeded 7.5, the loose foamed partially foamed post-foamable composition was discharged. In addition, many cracks occurred in the container body due to long-term storage. Furthermore, although the viscosity of the post-foamable composition was high, the discharged product of Comparative Example 3 in which the pH exceeded 7.5 due to saponification of a fatty acid was discharged in a state where gel and foam were mixed. In addition, many cracks occurred in the container body due to long-term storage.

DESCRIPTION OF SYMBOLS 1, 1a Discharge product 2 Container main body 3, 3a Valve assembly 31 Cover cap 32 Valve main body 33 Cap main body 34 Edge 35, 35a Housing 351, 351a Tubular part 352, 352a Flange part 353, 353a Upper surface side extension part 354 Lower part Side extension part 36 Stem rubber 37 Elastic member 38 Communication hole 39 Through hole 4 Discharge member 41 Nozzle part 42 Operation part 43 Discharge hole 44 Discharge passage 5 External container 51 Shoulder part 52 Neck 6 Internal container 61 Flange part 62 Groove 8 Stem 81 Stem hole 82 Passage in stem C Post-foamable composition G Pressurizing agent P1 Boundary part S1 First storage chamber S2 Second storage chamber

Claims (8)

Consists of a stock solution and a foaming agent,
A viscosity at 5 ° C. of 10,000 mPa · s or more;
The undiluted solution is
Including a surfactant and water,
A post-foamable composition having a pH at 25 ° C of 5 to 7.5. The surfactant includes a nonionic surfactant,
The post-foamable composition of claim 1, wherein the non-ionic surfactant comprises a branched fatty acid ester.   The post-foamable composition according to claim 1, wherein the surfactant includes an amino acid-based surfactant.   The post-foamable composition according to any one of claims 1 to 3, wherein the stock solution contains a viscosity modifier. A container body made of a synthetic resin filled with the post-foamable composition and the pressurizing agent according to any one of claims 1 to 4, and a valve assembly attached to the container body,
A discharge product, which discharges the post-foamable composition by pressurizing with the pressurizing agent. The container body includes an external container, and an internal container having flexibility and accommodated in the external container.
A first storage chamber is formed between the outer container and the inner container,
A second storage chamber is formed in the internal container,
The discharge product according to claim 5, wherein one of the first storage chamber and the second storage chamber is filled with the post-foamable composition, and the other is filled with the pressurizing agent. The post-foamable composition is filled in the first storage chamber,
The discharge product according to claim 6, wherein the pressurizing agent is filled in the second storage chamber.   The discharge product according to claim 6, wherein the outer container is made of polyester.

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